Brems, Camilla Riff, Niels Buus Kristensen, e Brigitte Sloth. «Congestion Costs». Proceedings from the Annual Transport Conference at Aalborg University 9, no. 1 (Dezembro 31, 2002). Acedido Julho 22, 2024. https://journals.aau.dk/index.php/td/article/view/4592.